/Engine/Source/Runtime/Engine/Classes/PhysicsEngine/BodyInstance.h
Add a force at a particular position (world space when bIsLocalForce = false, body space otherwise)
void AddForceAtPosition ( const FVector & Force, const FVector & Position, bool bAllowSubstepping, bool bIsLocalForce, const [FAsyncPhysicsTimestamp](API\Runtime\Engine\GameFramework\FAsyncPhysicsTimestamp) TimeStamp, [APlayerController](API\Runtime\Engine\GameFramework\APlayerController) * PlayerController )